Oho Oasis is a location in Mario & Luigi: Superstar Saga. It is one of the largest areas in the Beanbean Kingdom and is home to the temples of the Element Gods. There is also where Mario and Luigi learn the Firebrand and Thunderhand moves for the first time.
The Fire Palace is located on the left side and is only fully visited by Mario. This is where the Sun God rests and the orb containing the Firebrand power sits. Mario places his palms on the orb and soon gains the power of the Firebrand. Surprised and excited, the Sun God happily teaches Mario how to use the Firebrand technique. After that, the Sun God goes back to slumber.
The Thunder Palace is located on the right side and is only fully visited by Luigi. This is where the Thunder God rests and the orb containing the Thunderhand power sits. Luigi places his palms on the orb and soon gains the power of the Thunderhand. Surprised by Luigi's bravery, the Thunder God teaches Luigi how to use the Thunderhand then goes back to his slumber.
After getting out from underwater, Mario and Luigi end up at Oho Oasis. They quickly find out that they can't leave without a special power. Then, they both visit the Fire and Thunder temples where they learn the Firebrand and Thunderhand. They can now use their new powers to leave Oho Oasis and to the next destination.